<template>
  <view v-if="$store.state.cart.cart.length !== 0">
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域 -->
    <uni-swipe-action>
        <block v-for="(goods, i) in $store.state.cart.cart" :key="i">
          <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
          <uni-swipe-action-item :right-options="dataList.options" @click="swipeActionClickHandler(goods)">
            <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler"
              @num-change="numberChangeHandler"></my-goods>
          </uni-swipe-action-item>
        </block>
    </uni-swipe-action>
    <view style="height: 50px;width: 100%;"></view>
    <!-- 结算区域 -->
    <my-settle></my-settle>
  </view>
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import {
    reactive
  } from 'vue'
  import {
    useStore
  } from 'vuex'
  import {
    onShow
  } from '@dcloudio/uni-app'
  import {
    cartLogo
  } from '../../hooks/index.js'
  export default {
    setup() {
      const store = useStore()
      const dataList = reactive({
        options: [{
          text: '删除', // 显示的文本内容
          style: {
            backgroundColor: '#C00000' // 按钮的背景颜色
          }
        }]
      })
      onShow(() => {
        // 在页面刚展示的时候，设置数字徽标
        cartLogo()
      })
      // 单选按钮
      const radioChangeHandler = (e) => {
        // console.log(e) // 输出得到的数据 -> {goods_id: 395, goods_state: false}
        store.commit("cart/updateGoodsState", e)
      }
      // 增加 减少数量
      const numberChangeHandler = (e) => {
        store.commit("cart/updateGoodsCount", e)
      }
      // 点击了滑动操作按钮
      const swipeActionClickHandler = (goods) => {
        store.commit("cart/removeGoodsById", goods.goods_id)
      }
      return {
        radioChangeHandler,
        numberChangeHandler,
        swipeActionClickHandler,
        dataList
      }
    }
  }
</script>

<style lang="scss">
  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;

    .empty-img {
      width: 90px;
      height: 90px;
    }

    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }

  .goods-item {
    // 让 goods-item 项占满整个屏幕的宽度
    width: 750rpx;
    // 设置盒模型为 border-box
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #f0f0f0;
  }

  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 10px;
    }
  }
</style>
